Third party phone repair shops say that phone makers like Apple and game console makers like Sony and Microsoft have effectively monopolized repair, using their size and power to drive smaller companies out of business.

Verizon and Apple have worked in union to thwart such bills in several states, but traditionally don't like to publicly talk about their lobbying on this front. They now have another state to worry about, with Washington State considering their own right to repair bill, created in the wake of outrage over Apple's decision to throttle the performance of older phones to (Apple insists) protect device integrity in the wake of failing battery performance.

I've said it a million times by now, but I see no reason why computers should be treated any different than cars: PC and phone makers should be forced to publicise the necessary information to allow third-party repair shops to repair their devices, all without voiding warranty.

I would not put it past automobile manufacturers to make it impossible to repair cars outside of dealership. It is already hard enough to deal with electronic diagnostic systems.

Ask farmers in the United States how difficult it is to repair/maintain a modern tractor. They are as effectively locked down as a smartphone, with the manufacturers basically locking the "owner" out of any self-repair.

To be fair, they offer great warranties and very fair repair/replacement services, so while by the letter of the topic, it's a good example, by the spirit, maybe not the best to make the point that we need the right to repair laws.
I do respect your point, though.